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Can anyone tell me what automatic trans I've got in my '69? It's got a 351W, and I'm positive that the car is stock and original. How can I tell the differance between the possible trans?:confused: :confused:
 

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Look at your door data tag. The very last number is for the trans.

1= 3 SPEED MANUAL
5 =4 SPEED MANUAL
6 =4 SPEED CLOSE RATIO
U =C6 AUTOMATIC
W =C4 AUTOMATIC
X =FMX AUTOMATIC
 

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If you have a 351W chances are the AT is an FMX.
 

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Ooops - hit "submit" too soon....:eek: (it's an age thing)
C4s were not available in 69s, but C6s were - with a big block. So if you have the original and a 351 then chances are very good that you have an FMX.
Crawl under there and look at it.
An FMX is in 3 pieces - bell housing, body, tail shaft. The middle section is iron(?) - it's not aluminum like the bell and tail.
A C6 is 2 pieces, both aluminum.
 
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